2981198661 has 24 divisors (see below), whose sum is σ = 4631911200. Its totient is φ = 1700590752.

The previous prime is 2981198651. The next prime is 2981198699. The reversal of 2981198661 is 1668911892.

It is not a de Polignac number, because 2981198661 - 2¹¹ = 2981196613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981198651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69015 + ... + 103563.

It is an arithmetic number, because the mean of its divisors is an integer number (192996300).

Almost surely, 2^2981198661 is an apocalyptic number.

2981198661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2981198661 is a deficient number, since it is larger than the sum of its proper divisors (1650712539).

2981198661 is a wasteful number, since it uses less digits than its factorization.

2981198661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35153 (or 35146 counting only the distinct ones).

The product of its digits is 373248, while the sum is 51.

The square root of 2981198661 is about 54600.3540373137. The cubic root of 2981198661 is about 1439.2303405338.

The spelling of 2981198661 in words is "two billion, nine hundred eighty-one million, one hundred ninety-eight thousand, six hundred sixty-one".